Q2. Is it waterproof? A2. It's IP54 Life Waterproof, not suitable for swimming or diving.

Q3. Does it support SIM card or TF card or Memory Card? A3. It supports Nano SIM card. But not support TF or memory card.

Q4. Can I change the strap of the smart watch? A4. No, the strap can not be changed.

Q5. If I do not inseart SIM card, but I connect LF16 Bluetooth with my phone. Can I make phone call or receive phone call? A5. Sorry, after connect bluetooth with your phone, you can only get phone call remind or phone notification remind.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.ADVANCED CONFIGURATION: Chip: MTK6580 1.3G Quad Core; Memory: RAM 512MB + ROM 8GB; Operating System: Android 5.1; Screen: 1.39 inch IPS OLED Round Screen; Resolution: 400*400; Battery: 360 mAh Capacity Battery. Supports downloading many popular applications in Google play.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.ADVANCED CONFIGURATION: Chip: MTK6580 1.3G Quad Core; Memory: RAM 512MB + ROM 8GB; Operating System: Android 5.1; Screen: 1.39 inch IPS OLED Round Screen; Resolution: 400*400; Battery: 360 mAh Capacity Battery. Supports downloading many popular applications in Google play.3G & WIFI & GPS SUPPORTED: Wifi: 802.11b/g/n; 3G: nano SIM card, GSM, WCDMA; Built-in accurate GPS navigation. The LF16 smart watch phone can independently make and receive phone calls, use the GPS map tracking, satellite positioning. With Voice assistant, GPS helps you to locate and determine the correct direction.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.ADVANCED CONFIGURATION: Chip: MTK6580 1.3G Quad Core; Memory: RAM 512MB + ROM 8GB; Operating System: Android 5.1; Screen: 1.39 inch IPS OLED Round Screen; Resolution: 400*400; Battery: 360 mAh Capacity Battery. Supports downloading many popular applications in Google play.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.ADVANCED CONFIGURATION: Chip: MTK6580 1.3G Quad Core; Memory: RAM 512MB + ROM 8GB; Operating System: Android 5.1; Screen: 1.39 inch IPS OLED Round Screen; Resolution: 400*400; Battery: 360 mAh Capacity Battery. Supports downloading many popular applications in Google play.3G & WIFI & GPS SUPPORTED: Wifi: 802.11b/g/n; 3G: nano SIM card, GSM, WCDMA; Built-in accurate GPS navigation. The LF16 smart watch phone can independently make and receive phone calls, use the GPS map tracking, satellite positioning. With Voice assistant, GPS helps you to locate and determine the correct direction.MAIN FEATURES: Heart Rate Monitor, Weather Live, Pedometer, Calls from Your Wrist, Bluetooth Earphone Connection, Pick and Choose Your Watch Face, Play Music, Map Navigation, IP54 Life Waterproof(Not suitable for swimming or diving).TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.ADVANCED CONFIGURATION: Chip: MTK6580 1.3G Quad Core; Memory: RAM 512MB + ROM 8GB; Operating System: Android 5.1; Screen: 1.39 inch IPS OLED Round Screen; Resolution: 400*400; Battery: 360 mAh Capacity Battery. Supports downloading many popular applications in Google play.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.ADVANCED CONFIGURATION: Chip: MTK6580 1.3G Quad Core; Memory: RAM 512MB + ROM 8GB; Operating System: Android 5.1; Screen: 1.39 inch IPS OLED Round Screen; Resolution: 400*400; Battery: 360 mAh Capacity Battery. Supports downloading many popular applications in Google play.3G & WIFI & GPS SUPPORTED: Wifi: 802.11b/g/n; 3G: nano SIM card, GSM, WCDMA; Built-in accurate GPS navigation. The LF16 smart watch phone can independently make and receive phone calls, use the GPS map tracking, satellite positioning. With Voice assistant, GPS helps you to locate and determine the correct direction.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.ADVANCED CONFIGURATION: Chip: MTK6580 1.3G Quad Core; Memory: RAM 512MB + ROM 8GB; Operating System: Android 5.1; Screen: 1.39 inch IPS OLED Round Screen; Resolution: 400*400; Battery: 360 mAh Capacity Battery. Supports downloading many popular applications in Google play.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.TIMELESS CLASSIC: The LF16 has the aesthetics of a truly premium watch design. It's also built for you to go days without needing your phone. You get to feel free with LF16. The thickness of LF16 body is only 1.2cm. It looks and feels natural on your wrist and when you use it. Like a traditional watch, and much more capable.ADVANCED CONFIGURATION: Chip: MTK6580 1.3G Quad Core; Memory: RAM 512MB + ROM 8GB; Operating System: Android 5.1; Screen: 1.39 inch IPS OLED Round Screen; Resolution: 400*400; Battery: 360 mAh Capacity Battery. Supports downloading many popular applications in Google play.3G & WIFI & GPS SUPPORTED: Wifi: 802.11b/g/n; 3G: nano SIM card, GSM, WCDMA; Built-in accurate GPS navigation. The LF16 smart watch phone can independently make and receive phone calls, use the GPS map tracking, satellite positioning. With Voice assistant, GPS helps you to locate and determine the correct direction.MAIN FEATURES: Heart Rate Monitor, Weather Live, Pedometer, Calls from Your Wrist, Bluetooth Earphone Connection, Pick and Choose Your Watch Face, Play Music, Map Navigation, IP54 Life Waterproof(Not suitable for swimming or diving).COMPATIBILITY: Bluetooth 4.0, compatible with Android Phones. Install the apk "Sinwear", after connect with Bluetooth and apk on phone, LF16 can get phone call remind, message remind. It can also remote camera, remote music, find phone.